Finasteride Patent Expiration
Finasteride is used for treating male pattern baldness and androgenic alopecia. It was first introduced by Organon Llc A Sub Of Organon And Co
Finasteride Patents
Given below is the list of patents protecting Finasteride, along with the drug name that holds that patent and the company name owning that drug.
| Drug Used in | Drug Patent Number | Drug Patent Title | Drug Patent Expiry | Drug Owner |
|---|---|---|---|---|
| Proscar | US5942519 | Prevention of precipitated acute urinary retention |
Oct 23, 2018
(Expired) | Organon |
| Propecia | US5571817 | Methods of treating androgenic alopecia with finasteride [17β-N-mono-substituted-carbamoyl-4-aza-5-α-androst-1-en-ones] |
Nov 05, 2013
(Expired) | Organon |
| Propecia | US5547957 | Method of treating androgenic alopecia with 5-α reductase inhibitors |
Oct 15, 2013
(Expired) | Organon |
| Propecia | US5886184 | Finasteride processes |
Nov 19, 2012
(Expired) | Organon |
| Proscar | US5886184 | Finasteride processes |
Nov 19, 2012
(Expired) | Organon |
Finasteride's Family Patents
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Clinical Trials
Recent Clinical Trials on Finasteride:
Sometimes companies keep conducting clinical trials even after the drug's approval to discover new formulations, methods of use, or new treatment indications, so they could file for additional patents or receive regulatory exclusivity extensions, such as pediatric exclusivity, potentially delaying generic competition. Based on these recent clinical trials, generic companies need to consider the potential for new intellectual property or regulatory hurdles. These strategic moves by the drug owner might delay generic substitution or lead to additional sales of the brand drug, even after patent expiry.
| Title | Lead Sponsor | Collaborators | Status | Phases |
|---|---|---|---|---|
 | ||||
| Testosterone Therapy With or Without Finasteride After Spinal Cord Injury: TRT-SCI Trial | VA Office of Research and Development | NA |
NOT YET RECRUITING
(Jul 1, 2026)
| PHASE2, PHASE3 |
| Effect of Testosterone on Elderly Frail Men With Testosterone Deficiency | Rune Skovgaard Rasmussen | NA |
NOT YET RECRUITING
(Apr 1, 2026)
| PHASE2 |
| Androgenic Alopecia TH07 Clinical Trial | Triple Hair Inc | NA |
RECRUITING
(Mar 1, 2026)
| PHASE3 |